A military film report on the advance of members of U.S. Army 5307th Composite Unit nicknamed Merrill's Marauders towards Myitkyina, Burma for its capture during World War II. A U.S. Army Air Force C-47 Skytrain transport airplanes drop parachute supplies. U.S. Army General Frank Merrill confers with U.S. OSS (Office of Strategic Services) Detachment 101 trained personnel. Merrill's Marauders advance through a jungle and along an open flat field. Dead bodies of Japanese soldiers lying on the field. Merrill's Marauders fire machine guns and mortars towards enemy positions in the jungle. Dead bodies of Japanese soldiers after being attacked by Merrill's Marauders. A wounded man on a stretcher is given water. Wounded soldiers are evacuated.